Flora of North America species comparison

few to several from base, erect to ascending or decumbent, branched distally, 1–4.5(–7) dm.

several from base, erect or decumbent basally, branched (several) distally, (0.8–)2.1–6.6(–9.2) dm.

(soon withered);

not rosulate;

petiole 0.5–4(–6) cm;

blade 1- or 2-pinnatisect, 1–6(–8) cm, margins (of lobes) entire or dentate (sometimes deeply lobed).

(early withered);

not rosulate;

petiole 0.9–4.4 cm;

blade obovate, spatulate, or ovate, (1.8–)2.5–8.6(–14) cm × 10–37 mm, margins subentire or dentate.

shortly petiolate to subsessile;

blade similar to basal, smaller and less divided distally, lobes lanceolate to oblong or elliptic, 1.5–3.5(–4.5) cm ×5–12 mm, base not auriculate, margins (of lobes) entire, serrate, or incised.

sessile;

blade obovate to oblong or lanceolate to oblanceolate, (1.5–)2.6–9.3(–13.2) cm × (7–)12–31(–45) mm, base sagittate-amplexicaul or auriculate, margins dentate or entire, (surfaces pubescent or glabrous).

elongated in fruit;

rachis glabrous or pubescent, trichomes straight, cylindrical.

(corymbose panicles), elongated in fruit;

rachis glabrous or puberulent, trichomes cylindrical, straight or curved.

sepals (tardily deciduous), ovate, 0.5–0.7(–0.9) mm;

petals white, elliptic to linear, 0.4–0.5 × ca. 0.1 mm, claw absent;

stamens 2, median;

filaments 0.3–0.6 mm;

anthers 0.1–0.2 mm.

sepals oblong to ovate, 1.7–3 × 1–1.6 mm;

petals white, obovate, 3–5 × 1.2–2.4 mm, claw 1.2–2 mm;

stamens 6;

filaments 2–3.3 mm, (glabrous);

anthers 0.5–0.6 mm.

divaricate to horizontal, straight slightly recurved, (terete), 1.4–2.5(–4) × 0.15–2 mm, glabrous or sparsely pubescent adaxially.

ascending to horizontal, straight, (terete), 5–16(–19) × 0.2–0.3 mm, glabrous or sparsely puberulent adaxially.

schizocarpic, didymous, 1.3–1.7 × 2–2.5 mm, apically not winged, apical notch 0.2–0.4 mm deep;

valves thick, rugose, strongly veined, glabrous;

style absent or obsolete, included in apical notch.

(indehiscent), obovoid to subglobose or obcompressed globose, 3.5–5.8(–7) × (3.5–)4–6.2(–7) mm, apically not winged, apical notch absent;

valves thin, smooth, often not veined, glabrous;

style (0.8–)1.2–2(–2.3) mm.

ovate, 1–1.2 × 0.7–0.8 mm.

(dark reddish brown), ovate, 1.5–2.3 × 1–1.3 mm.

= 32.

= 48, 80, 128.